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How to create a bar plot with bars for missing values in R?
To create a bar plot in R, we can use barplot function but if there exist some missing values in the data then we can use ggplot2 package. For example, if we have a data frame having two vectors say x and y, x containing categorical values with NA as one of the values and y having counts/frequency for each of the categories then the bar plot will be created by using the command ggplot(df,aes(x,y))+geom_bar(stat="identity").
Example
Consider the below data frame −
> x<-c("A","B",NA)
> y<-c(24,21,45)
> df<-data.frame(x,y)
> dfOutput
x y 1 A 24 2 B 21 3 <NA> 45
Creating bar plot using barplot function −
> barplot(y~x,data=df)
Output
Loading ggplot2 package and creating bar plot using geom_bar function of ggplot2 package −
> library(ggplot2) > ggplot(df,aes(x,y))+geom_bar(stat="identity")
Output
Updated on: 06-Mar-2021
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